DOI: 10.11799/ce201702001
Research on key mining technology and rock pressure control of gently inclined boundary coal in short-wall mining
MA Jin-gong
Abstract：Aiming at the large dip angle, unhandy mining equipment, plenty residual coal in mining dwelling and difficulty of mining pressure control in caving steep coal seam by continuous miner, the key technologies were proposed, pseudo-inclined angle adjustment for working face with inclination lower than 10° , continuous transport system lengthening and "two slope and three feed". Meanwhile, the deformation characteristics of working face roof were monitored by broken zone test, stress-strain measurement and mobile roof supports. The results show that: with optimization of equipment, technology and procedure, the problem of large dip angle has been solved and residual coal minimized; the roadway deformation is middle broken zone of 1.1m to 1.3m, the stability of surrounding rock increases with rock bolt lengthened to 2.4m; "coal pillar-isolated coal pillar-main roof" is an interactional community in the mining dwelling, periodic weighting of 1.5~2 mining section forms in the deformation process of isolated coal pillar comprising three stages:supporting , sharp decreasing of bearing capacity and deformation; using mobile roof supports for supporting pressure monitoring, can effectively control the stability of triangular area roof.
Keywords：short-wall mininggently-inclined seamscontinuous coal cuttertriangle coalisolated coal pillar
Publication Date：2017-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：4( 1-4 )